/* Base */
body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: #f7f7f7;
  color: #333;
  line-height: 1.6;
}

/* Header */
.site-header {
  text-align: center;
  padding: 2rem 1rem;
  background: white;
  border-bottom: 1px solid #e0e0e0;
}

/* Navigation */
.site-nav ul {
  display: flex;
  justify-content: center;
  gap: 2rem;
  padding: 1rem;
  margin: 0;
  list-style: none;
  background: #fff;
  border-bottom: 1px solid #e0e0e0;
}

.site-nav a {
  text-decoration: none;
  color: #333;
  font-weight: 500;
}

/* Layout */
.layout {
  display: grid;
  grid-template-columns: 1fr 250px;
  gap: 2rem;
  padding: 2rem;
  max-width: 1100px;
  margin: auto;
}

/* Main content */
.content .card {
  background: white;
  padding: 1.5rem;
  border-radius: 8px;
  margin-bottom: 1.5rem;
  border: 1px solid #e0e0e0;
}

.button {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.6rem 1rem;
  background: #0078ff;
  color: white;
  border-radius: 6px;
  text-decoration: none;
}

/* Sidebar */
.sidebar {
  background: white;
  padding: 1.5rem;
  border-radius: 8px;
  border: 1px solid #e0e0e0;
}

/* Footer */
.site-footer {
  text-align: center;
  padding: 1.5rem;
  margin-top: 2rem;
  background: #fff;
  border-top: 1px solid #e0e0e0;
}

/* Responsive */
@media (max-width: 800px) {
  .layout {
    grid-template-columns: 1fr;
  }
}